2,997 research outputs found

    Policy Issues in U.S. Transportation Public-Private Partnerships: Lessons from Australia, Research Report 09-15

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    In this report, the authors examine Australia’s experience with transportation public-private partnerships (PPPs) and the lessons that experience holds for the use of PPPs in the United States. Australia now has decades of experience in PPP use in transportation, and has used the approach to deliver billions of dollars in project value. Although this report explores a range of issues, the authors focus on four policy issues that have been salient in the United States: (1) how the risks inherent in PPP contracts should be distributed across public and private sector partners; (2) when and how to use non-compete (or compensation) clauses in PPP contracts; (3) how concerns about monopoly power are best addressed; and (4) the role and importance of concession length. The study examines those and other questions by surveying the relevant literature on PPP international use. The authors also interviewed 23 Australian PPP experts from the academic, public and private sectors, and distilled lessons from those interviews

    Wieszcz narodu tatarskiego (Gabdulla Tukaj)

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    Short overview on Tuqay's poetry

    Impact of the Synthesis Process on Structure Properties for AFCI Fuel Candidates

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    The research objectives are: • To explore a low-temperature fluoride route to synthesize actinide nitrides. • To characterize actinide nitrides structurally and thermally. • To use high resolution TEM techniques to explore the microstructure of the radioactive samples

    Quantum tomography of three-qubit generalized Werner states

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    In this article, we introduce a numerical framework for quantum tomography and entanglement quantification of three-qubit generalized Werner states. The scheme involves the single-qubit SIC-POVM, which is then generalized to perform three-qubit measurements. We introduce random errors into the scheme by imposing the Poisson noise on the measured photon counts. The precision of state estimation is quantified and presented on graphs. As a special case, we compare the efficiency of the framework for the pure three-qubit generalized Werner state and the W state. The reconstructed states are presented graphically and discussed

    NP-hard problems are not in BQP

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    Grover's algorithm can solve NP-complete problems on quantum computers faster than all the known algorithms on classical computers. However, Grover's algorithm still needs exponential time. Due to the BBBV theorem, Grover's algorithm is optimal for searches in the domain of a function, when the function is used as a black box. We analyze the NP-complete set {(M,1n,1t) TM M accepts an x{0,1}n within t steps}.\{ (\langle M \rangle, 1^n, 1^t ) \mid \text{ TM }M\text{ accepts an }x\in\{0,1\}^n\text{ within }t\text{ steps}\}. If tt is large enough, then M accepts each word in L(M)L(M) with length nn within tt steps. So, one can use methods from computability theory to show that black box searching is the fastest way to find a solution. Therefore, Grover's algorithm is optimal for NP-complete problems

    PRAGMATIC MODERNISM: PROJECT [\u3cem\u3ePROJEKT\u3c/em\u3e] AND POLISH DESIGN, 1956-1970

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    Recently Scholars of design history began to recognize the phenomenon of Socialist Modernism, the return to modernist aesthetics to Eastern Europe and the Soviet Union during the thaw, the disavowal of Stalinist policies by Nikita Khrushchev after the 20th Party Congress of the Communist Party in February of 1956 and the resulting turn away from Socialist Realism, a historicist method in architecture that expressed socialist values, which the Stalinist favored. Scholars of art and design argued that Socialist Modernism in Poland constituted an affirmation of the party’s authority and that of the political system because designers who practiced it focused on abstract form and technological experiments. Unlike the modernism of the early 20th century, which followed a utopian ideology to ensure universal well being through art and design, it focused on the aesthetics of elementary form. However, based on this research, I investigated the journal Projekt of the main state-sponsored publisher in the years, 1956-1970. I have found that its contributors practiced a pragmatic modernism. Although they focused on technological experiments and utilized abstract form, failing to engage in politics, the designers that surrounded Projekt attempted to create user center design that fostered the well being of man, avant-garde values that the 1920s and 1930s functional modernist groups of Central and Eastern advocated. Therefore, following a period of Socialist Realism (1948-1956) in Poland, Projekt advocated for avant-garde values in design while ignoring the political situation, therefore fulfilling a pragmatic site in which it tolerated the authoritarian party, but argued for user based, socially conscious design that connected it to like minded designers in the west
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